I downgraded to 1.7.5-11 and at least I can now print again from the network and access the CUPS configuration on port 631 as long as I don't try to establish an SSL/TLS connection. In this case, the daemon still crashes on libgnutls-deb0.so.28.41.0. If this isn't being resolved in the near future, I will probably try to upgrade to cups2 in testing and see whether this works better.
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